QT-based graphical sinks for gnuradio applications. Implements opengl, raster and native plotting methods, and supports a QT Style Sheet (QSS) file to adjust the look. Part of the main gnuradio build.

Top level component library. Defines core blocks. Handles settings for logging, performance counters, and control port. Part of the main gnuradio build.

Library for trellis coding modulation, including the Viterbi Algorithm, Concatenated Coding and Turbo Decoding based upon finite state machine (FSM) class. Part of the main gnuradio build.

Library of vocoder blocks, including ulaw, alaw, gsm and codec2. Debian uses external libraries for gsm and codec2.

0MQ messaging library support. Provide network socket endpoints for gnuradio data and message streams. PUB/SUB, PUSH/PULL, REP/REQ models supported.

Libevent is an asynchronous event notification library that provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached.